Press.



N0. 802,l28- PATENTED OUT. 17, 1905. F. L. WHITE.

PRESS.

APPLICATION FILED MAR.21, 1905.

3 SHEETS-SHEET 1.

1 13 "MB Int B H 0 JItiorney No. 802,128. PATENTED 0GT.17,1905.. F. L. WHITE.

PRESS.

APPLICATION IILED MAILZI, 1905.

3 SHEETS-SHEET 2.

witnesses No. 802,128. PATENTBD OUT. 1'7, 1905. F. L. WHITE.

PRESS.

APPLICATION FILED MAR.21, 1905 3 SHEETS-SHEET a.

witnesses I nuenior WK 8 [WM FTMEWZ ma M BY -Httarney Tl'NTTE STATES PATENT FFIGE.

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Specification of Letters Patent.

Patented Oct. 17, 1905.

, Application filed March Z1 1905. Serial N0v 251,241.

To all whom it may concern.-

Be it known that I, FRANK L. WHITE, a citizen of the United States, residing at Little Rock, in the county of Pulaski and State of Arkansas, have invented certain new and useful Improvements in Presses, of which the following is a specification.

The invention to be hereinafter described relates to presses, and more particularly to that type employed for compressing cotton into compact form for shipment. It is well known that cotton is first put up in large bales under more or less pressure; but in the interest-of economical transportation such bales are further compressed to reduce the bulk to convenient size for shipment. In this compression the bale is subjected to a pressure of from one thousand to two thousand tons, thus requiring expensive machinery and high-power devices of enormous strength. Attempts have been made heretofore to produce a machine of this character by the use of toggles and various forms of levers with rolling fulcrums but in such cases the length of stroke necessary to secure the required compression has been a serious objection, as well also as the size of parts and the loss of effective and rapid action.

The object of the present invention is to provide a compress of the general character indicated in which a short piston-stroke may be made effective in securing the required compression wherein the parts shall be of simple construction, rapid in action, and give greatly-increased pressure near the end of the compressing movement.

With these generally stated objects in view the invention consists of the parts and combinations to be hereinafter described and then definitely pointed out in the claims.

In the drawings, Figure 1, in side elevation, shows a compress provided with one form of the present lnvention, the parts being indicated in their lowest position. Fig. 2 is a sectional side elevation of the same, showing the osition of the parts in said compressionstro re, certain portions being broken away. Fig. 3 is a view similar to Fig. 2, showing the parts in full upward or compression position. Fig. 4 is a section on line x as of Fig. 3. Fig. 5 is a detail of one of the compression-cams, showing another form of cam-bearings; and Fig. 6 is a view similar to Fig. 5 with the roller-bearings omitted.

The frame A of the compress may be of any usual or suitable character adapted to and suitably secured thereto. is the upp withstand the strains incident td such devices. Extending across the top of frame A er platen A, against which the bale is raised and forced during compression.

Extending upward from the frame or upper platen are the supports A carrying the compression-cylinder A which is suitably secured to said supports. This cylinder is supplied with a usual piston, to which is connected the piston-rod A and has any usual form of supply and exhaust connections, as a M, for operating the piston, the cylinder itself having, preferably, an opening a in the to it its lower end the iston-rod A carries a cross head B, trave ing in guideways b,

formed in the supports A, to insure the roper vertical movement of such crosshead. Mounted on pivotal supports 6 b are the double cams B B, said compression-cams being operatively connected to the crosshead B by means of toggles b 6 as clearly shown in Figs. 2 and 3. The double compression-cams B B are disposed between the lower bearings C C and the upper bearings C C, said lower bearings C C being carried by the upper portion of the platen A and the upper bearings C C being secured to the depending arms C C which carry at their lower ends the lower movable platen D. From this general disposition of parts it will be seen that as the com ression-cams B B are turned on their pivota supports 1) b from the position shown in Fig. 1 successively to the positions shown in Figs. 2 and 3 under the lifting action of the bearings C C Will e raised, thus carrying the lower platen upward and compressing the bale between it and the upper fixed platen A. During this movement of the compression cams the curved portions 0 c at each end of the cams will ride upon the two bearings C C, and in order to minimize the friction due to such movement said bearings, as shown in Figs. 1, 2, and 3, may be provided with antifriction-surfaces, such as rollers c c.

It is essential, of course, in the upward movement of the upper bearings C C that they move in a straight line, and to secure this end such bearings C C are connected by the cross-ties G which serve to hold said bearings or the roller 0 c on opposite sides of the sup orts A in substantial contact with the gui ing edges a 0. it being understood, of course, that as the upper bearings are piston-rod A the upper sup raised the cross-tie C moves with them and maintains the proper guiding relation between the upper bearings and the edges (1 a of the support A Inasmuch as the double cams B B turn upon their pivotal supports 6 b as upon cen ters and the lower bearings C C have no upward or downward movement, it follows that the pivotal supports 1) b gradually move up ward and downward as the cams B B turn under the action of the toggles 5 5 In order to guide such pivotal supports in their movement and maintain them in the vertical line of centers passing through the upper and lower bearings C C, the said pivotal supports b b are rigidly connected by a link B one of which extends between the pivotal supports b b at each side of the machine, (see Fig. 4,) and as a further guiding means the pivotal supports 1) b may be provided with rollers b b, which will bear upon the edges a a of the support A as the pivots b b are raised and lowered in the manner described.

From the construction thus described it will be seen that as the double compressioncams B B turn upon their pivotal centers or ports I) b from the position indicated in Fig. 1 the portions 0 c-of the cams on opposite sides of the pivots b b will ride against the upper and lower bearings C C, thus imparting a lifting motion to the lower platen twofold greater than would be the case if the cams were turned about pivots or fulcrums near either end, and by reason of the fact that the pivots b b are at all times maintained in the vertical line of centers passing through the upper and lower bearings C C comparatively little strain is transmitted to the pivots b b, so that these may be made correspondingly small. Likewise by virtue of the double or compound action of the double cams B B turning upon pivots central thereof the length of stroke of the piston may be less than with end-pivoted cams or levers having only a single action. It will be noticed also that as the double cams B B turn upon their pivotal centers 1) b the end portions 0 c of the cams slide over the bearings C C, and to overcome the friction that might be incident to this motion the upper and lower bearings are provided with antifriction devices-as, for instance, the rollers c. As a modified form of the antifriction devices, Fig. 5 shows the upper and lower bearings C C formed as movable saddles having antifriction-rollers 0 which bear u on the curved surfaces of the double cams will be obvious.

In Fig. 6 the upper and lower bearings are formed without special antifriction devices, such bearings having curved seats d (1, carried by'the journals d d, the construction of which will be obvious from the description already given of the general characteristics of the upper and lower bearings.

B, as

Variations may be made in the details of structure as above described without departing from the present invention, the essentials of which are that compression-cams shall be centrally pivoted between the upper and lower bearings and have an operative connection with a piston or equivalent poweroperated device to turn such cams upon their pivotal centers, so that each end of the cams may act conjointly and simultaneously between the upper and lower bearings, the pivotal supports of the cams being moved up and down in the line of centers passing through the upper and lower bearings as the cams rotate and being guided at such times by suitable means, as the connecting-links between them.

Having thus described my invention, what I claim, and desire to secure by Letters Patent, is

1. In a compress, the combination of a suitable frame, a fixed and a movable platen, pivoted compression-cams, means for turning the compression-cams about their pivots, fixed and movable bearings between which the compression-cams turn, and connections between the movable bearings and one of the platens.

2. In a compress, the combination of a suitable frame, a fixed and a movable platen, pivoted compression-cams, a guiding device for the pivots of said c0mpression-cams to cause them to move in a vertical plane, means for turning the compression-cams about their pivots, fixed and movable bearings between which the compression-cams turn, and connections between the movable bearings and one of the platens.

3. In a compress, the combination of a supporting-frame, a fixed and a movable platen, centrally-pivoted compression-cams, a rigid connection between the pivots of the cams on opposite sides of the compress to cause the pivots to move in a vertical direction, fixed and movable bearings between which the compression-cams turn, means for turning the said cams, and connections between one of the platens and the said movable bearing.

4. In a compress, the combination of a supporting-frame, a fixed platen and a movable platen between which a bale is to be compressed, double compression-cams disposed on each side of the compress, said cams being pivotally supported at their centers, means for simultaneously turning the said double compression-cams about their pivotal centers, fixed and movable bearings disposed about each of said cams, connections between the movable bearings and the movable platen, and a rigid link connecting the pivots of the double compression-cams on opposite sides of the compress.

5. In a compress, the combination of a supporting-frame, a fixed and a movable platen, fixed and movable bearings, centrallypivoted double compression-cams disposed for the central pivots of the double compression-cams and for the movable bearings to cause the movable bearings and said central pivots of the cams to move vertically in the line of centers passing through the fixed and movable bearings.

6. In a compress, the combination. of a suitable frame, a fixed and a movable platen, pivoted compression-cams, means for turning the compression-cams about their pivots, fixed and movable bearings, provided with antifriction devices between which the compressioncams turn, and connections between the movable bearings and. one of the platens.

7. In a compress, the combination of a suitable frame, a fixed and a movable platen, pivoted compression-cams, a guiding device for the pivots of said compression cams to cause them to move in vertical plane, means for turning the compressioncams about their pivots, fixed and movable bearings, provided with antifriction-rollers, between which the compression-cams turn, and connections between the movable bearings and one of the platens.

8. In a compress, the combination of a supporting-frame, a fixed platen and a movable platen between Which a bale is to be compressed, double compression cams disposed on each side of the compress, said cams being pivotally supported at their centers, means for simultaneously turning the said double compression-cams about their pivotal centers, fixed and movable bearings, each provided with antifriction devices and disposed about each of said cams, connections between the movable bearings and the movable platen, and a rigid link connecting the pivots of the double compression-cams on opposite sides of the compress.

9. In a compress, the combination of a suitable frame, a fixed and a movable platen, fixed and movable bearings, each provided with antiiriction devices, double compression-cams centrally pivoted and disposed between said fixed and movable bearings, a cross-tie connecting the movable bearings on opposite sides of the compress, a link or bar connecting the central pivots of the doubleacting cams, depending arms connecting the movable bearings and movable platen, a piston and toggle connections between the piston and the double compression-cams to turn the latter simultaneously about their central pivots, the movable bearings and central pivots being moved thereby in the vertical line of centers passing through the fixed and movable bearings.

In testimony whereof I afifix my signature in presence of witnesses.

Y FRANK L. WHITE.

Witnesses:

T. C. SALTER, R. H. MILLS, J. H. MAGILL. 

